I was thinkin... wen u put the choke on.. its to give a rich fuel mixture right and reduce air intake. so mebe thers not enough air getting in with the choke on. could it be the air filter that needs looking at?
The bloody thing was serviced like 6 months ago (cuz before that it had sat in the garage for about 10 years or something according to my dad). even after service starting on choke was a bitch